Lay motion for looms



1953 w. .1. BUDZYNA ETA L ,62

LAY MOTION FOR LOOMS Filed June 29, 1950 INVENT WALTER J. Buo NA BYMAURICE QFLAMAND A TTORNE Y Patented Jan. 6, i953 LAY MOTION FOR LOOMSIWalter J. Budzyna, East Douglas, Mass., and

Maurice R. Flamand, Central Falls, R. L, assignors to DraperCorporation, Hopedale, Mass., a corporation of Massachusetts ApplicationJune 29, 1950, Serial No. 171,20 -In Brazil April 1 8, 1949 9 Claims.

This invention pertains to lay motions for looms, and moreparticularly,- to such motions adapted for use with shuttleless loomsand to provide a period of dwell at that part of the cycle during whichthe filling is inserted. This application is a division of ourapplication Serial No.

71,622, filed January 19.1949.

It is an object of the invention to improve the lay motion for a 100mand to provide for effectively beating up the fabric during a portion ofthe cycle while permitting the lay to remain'stationary, or nearly so,throughout a sufficient period of time during the rest of the cycle, for

the filling to be inserted and for the filling inserting' mechanism tobe withdrawn from the shed. a I Other objects of the invention willbecome apparent from the following disclosure.

In high speed looms and especially shuttleless looms it is desirable tolighten the lay structure to reduce the mass which is to be swung to andfro for performing the beat-up function, and to provide actuating meansfor the lay which shall effect its movement to the beat-up positiontrated by the particular embodiment herein shown and described, apositively 'rotated cam mechanism is provided and is caused to functionin cooperation with novel follower means forming a part of theoscillating lay structure to move the lay in a predetermined timedrelationship to the movement of other parts of the loom for the purposeof beating the filling into the shed. I This cam means also provides fora. dwell of approximately one half the period of time consumed for acomplete cycle incidental to the insertion of a single pick. Theinvention will be described hereinafter in greater detail byreference-to one specific embodiment thereof as evident in theaccompanying figures of drawing wherein like parts are indicated by likereference characters, and wherein: v

Fig. 1 is a section transversely through part of a loom showing the lay,rock shaft and details of the lay swords, the rocker arms and the camand cam follower means by which the lay is swung to and fro.

Fig. 2 is a section taken at line 2-2, Fig. 1, and

means Fig. 3 is a layout of the cams themselves.

Fig. 4 is a front elevation of a loom framework, rock shaft, cam shaft,lay swords and attendant mechanism.

Now referring to the figures, a cam shaft I0 is. supported in suitablebearings in loomsides (not shown) and carries adjacent the inner face ofeach loomside pair of cams designated by numerals II and 12. These camsare fixed to the cam shaft to rotate therewith and serve to impartmovement to the lay, reed, etc. The cam shaft itself is-driven through aclutch and gearing from a motor or other source of power, or in anyother convenient manner.

A lay beam l3, reed l4 and hand rail l5 are carried by lay swords. I 6which are adapted to rock on a rock shaft H. The actual construction ofthe lay swords is such that in cooperation with the supporting meanstherefor which forms a part of the rocking levers l8,.the lay itself maybe vertically adjusted, each end thereof being capable of independentmovement.

The swords are machined to have fiat surfaces somewhat verticallydisposed, each of which forms the face of a pad [9 which is slidablymounted upon a corresponding pad 20 on its respective lever l8. A keyand key slot designated by numeral 2| maintain the parts in propervertical alignment and a pair of adjusting studs having nut 22 and 23pass through elongated slots in the pad l9 and are held Within the 00-operating pad 20 to maintain the parts in any desired adjusted position.

v The actual vertical positioning of the swords and parts carriedthereby is effected by lifting screws 24 threaded downwardly into thetop portion of the pads 20 and having their heads bearing against ashoulder or ledge 25 cast as an integral part of the swords themselves.A locking nut 26 maintains the parts adjusted in properly elevatedposition in addition to the clamping studs and their nuts 22 and 23.

The levers l8 of'which there are two, one at each lay sword and thus oneadiacent each end of the machine, are forked having one fork portion 2offset slightly toward the outer end of the-loom so as to align with thecam H which is at the outer end of the cam shaft as compared to'the caml2. This forked and offset; end 21 carries a follower in the form of aroller 28 for engagement with the cam II.

The other end of the fork desi nated by immeral 29 has a pivot 30 onwhich is freely oscillatable a two-armed lever 3| to the outer end ofwhich is pivoted a follower roller 32 similar to the roller 28. Thislever 3| aligns with the main portion of the arm 18 and thus the roller32 is in alignment with and contacts cam 12 all as illustrated in thesectional view in Fig. 2 taken at line 2-2 of Fig. l. The arm 3| ispivoted at point 30, but is always urged by a spring 33 or otherresilient means, so that the roller 32 is pressed toward its cam or, tostate it in another way, the two followers 28 and 32 are always pressedtogether with a definite amount of resilient force so that they alwayscontact their cams one of which is a positive cam for moving the lay andthe reed to beat up position while the other is merely a return camfunctioning through the resilient spring 33.

Spring 33 is compressed between the end of the lever 3t and a'pad on arib 34 on the arm IB, axial positioning of the parts being assured by aT-headed bolt 35 passing through the end of the arm 3! and through aboss on the rib 34 to be locked in position by nuts 36. The followers 28and 32 are preferably of fibrous material such as one of the Well knownphenolic resins-or other similar compounds adapted to be molded underextreme pressure and each of these rollers is mounted onits pivot orspindle upon-needle bearings or other antifriction means. The adjustmentof the bolt 35 and of the spring 33 is such that there will never be anyappreciable play between the followers and their cams and theconstruction provides further for easier setting of the parts initiallyorfor adjustment after an extended period during which there will'havebeen a certain amount of wear. 7

Abushing 3l surrounding the bolt and enclosed by the spring serves tolimit movement of the lever 3| relatively toarm 18 in case the sprinshould fail. ,In that event the rollers 28 and 32 may move away fromtheir cams about to /8" according to the clearance. provided at the end.of bushing 31, but that can lead to no particular difiiculty except fornoisy operation until the loomis stopped and thespring replaced.Otherwise the timing of the lay relative to the tape movement might besoadversely affected that .a serious smash Wouldresult.

Now referring more specifically to Fig. 3, the cams H and I2 arepreferably formed integrally by casting, :but may be fabricated in anyother manner and need not be integral since each may be separately andrigidly fixed to .a single hub or to the shaft itself. The preferredconstruction is, however, that which .is illustrated here. ,A hub 38 isprovided with .bosses through which set screws are threaded for thepurposeof tightening the cams on the cam shaft when their positionhas1once been established. .sincetheother parts working from .the camshaft are .all separately adjustable, it is not necessary to change.theposition of these once-theircorrect position has'been established.The cams are .divided into two portions, one of which isanractiveportion providing for the movement of the lay while .the other -oppositepart thereof is concentrically disposed about the shaft and provides fordwell of the lay while the filling is being inserted. ,It has beenfoundthat a dwell of from 180 to .210 serves quite satisfactorily,although it is to .be-understood that deviations from those figuresare-pos sible and for certain purposes or under certain circumstances,the dwell may vary slightly above or below those figures.

Since the followers 28 and-32 are angularly disposed with respect toradial lines through their centers and through :thepivot "H,a'corresponding oifsethas to be provided between the points her of ways.

of the cams themselves. As here shown, that offset amounts to 15%,although for other angular separation of the follower rolls andvariations in other factors, corresponding changes must necessarily beeffected. The point of the active or beat ,up cam ;l;l is actuallypositioned 119 /2 ahead of the next following active'portion of thereturn cam. That figure has been adopted for a cam having a 200 dwell,and of course, is subject to .changeas circumstances require.

While one embodiment of the invention has been disclosed, it is to beunderstood that the inventive concept may be carried out in a num- Thisapplication is, therefore, not tobe limited to the precise detailsdescribed, but

:isintended to .cover all variations and modifications thereof fallingwithin the spirit of the invention and the scope of the claims.

We claim:

1. In a lay motion for a loom, a rock shaft, a cam follower arm on saidrock shaft, lay swords movable with said arm as it is rocked on saidrock shaft, a lay carried by said swords, a cam shaft, a pair of cams onsaid cam shaft and followers on said cam follower arm, one of which isengageable with one of said cams for moving the lay to beat the fillinginto the shed and the other of which is engageable with the otherfollower to return the lay to a filling laying position.

2. In a lay motion for a loom, a rock shaft, a cam follower arm on saidrock shaft, lay swords .movable with said arm as it is rocked on saidrock shaft, a lay carried b said swords, a cam ,shaftand a pair of camson said shaft for moving the lay to and from a position of rest duringwhich the filling ,is laid and a position in which a reed carried bysaid lay is effective for beating the ,filling into the shed of thefabric, a cam follower on said arm on the rockshaft engageable with oneof said cams effective for moving the lay to the said filling beat upposition, a second arm pivoted .to the arm just above mentioned and afollower on that arm engageable with the other of said cams forreturning the lay to its position of rest, and resilient means formoving the said second .mentioned arm to a position in which thefollower carried thereby is pressed tightly against the cam with whichit engages.

3. In a lay motion for a loom, a rock shaft, a cam follower arm on saidrock shaft, lay swords one of which is movable with said arm andadjustably attached :to said arm for movement radially of the rock shaftthereby to adjust the position of a lay carried by said swords, a camshaft, a pair of camson said cam shaft and followers on said camfollower arm, one of which is engageable with one ,of said camsformoving the lay to beat upthe filling into the shed of the fabric, andthe other of which is engageable with the other follower on said arm toreturn the lay to a filling inserting position.

4. .In a .lay motion for ;a loom, a rock shaft,

a cam follower arm on said rock shaft said arm comprising a forked,articulated portion, a cam shaft, apair of cams on-saidshaft rotatabletherewith,-and followers, one carriedat each extremity of the forkedportion of said cam follower arm, one said follower being engageablewith one cam for moving the lay to beat up position and the otherfollower being engageable with the other of said cams for returning thelay to a filling inserting position, and spring means effectiveupon saidarticulated forked portion of the arm for urging said followers into.pressure engagement with their respective cams.

5. In a lay motion for a loom, a rock shaft, cam follower arms on saidrock shaft, said arms each having an extended portion forming a bearingfor a lay sword upon which the lay and reed are carried, each lay swordhaving slidable engagement with the bearing portion of its respectiverock shaft arm, adjustable means for moving the sword radially towardthe rock shaft and locking means for retaining it in an adjustedposition.

6. In a lay motion for a loom, a rock shaft, a cam follower arm adjacenteach end of said rock shaft, each said arm having a somewhat verticallyextending portion forming a slidable bearing for a similar,complementary slidable portion of a lay sword upon the opposite end ofwhich is carried a lay and a reed, and means for adjusting and lockingeach said sword in position which comprises threaded bolt means passingthrough slots in one member and effective to clamp that member againstthe other, and a threaded adjusting means extending along the lay swordand vertically extending portion of the cam follower arm, said meansbeing threaded into one of said members and bearing at its other endagainst an abutment on the other member.

7. In a lay motion for a loom, a rock shaft, cam follower arms on saidrock shaft, lay swords and a lay carried by said rock shaft and movablewith said arms, a cam shaft, a pair of cams on said shaft and rotatabletherewith, said follower arms further comprising forked extensions, afollower on one said extension engageable with one of the cams formoving the lay to one extreme position, a two-armed lever pivoted at theother fork extension and a follower at one end of said lever engageablewith the other cam,and spring means between the other end of said leverand the follower arm for resiliently biasing the followers toward theircams, and adjusting means for limiting the movement of said followertoward their cams.

8. In a lay motion for a loom, a rock shaft, a cam follower arm on saidrock shaft, lay swords movable with said arm as it is rocked on saidrock shaft, a lay carried by said swords, a cam shaft and cams on saidcam shaft, a cam follower on said arm on the rock shaft engageable withone of said cams effective to move the lay in one direction, a secondarm pivoted to the first arm and a follower on that arm engageable withthe other of said cams for moving the lay in the other direction,resilient means for moving the said pivoted arm to a position in whichthe follower carried thereby is pressed toward its cam and meansoperative upon failure of said resilient means for limiting the movementof the pivoted arm to an extent such that the motion imparted to the layshall not be substantially diminished.

9. In a lay motion for a loom, a rock shaft, a cam follower arm on saidrock shaft, lay swords movable with said arm as it is rocked on saidrock shaft, a lay carried by said swords, a cam shaft, and a pair ofcams on said shaft for moving the lay to and from a position of restduring which the filling is laid and a position in which a reed carriedby said lay is effective for beating the filling into the shed of thefabric, a cam follower on said arm on the rock shaft engageable with oneof said cams effective for moving the lay to the said filling beat upposition, a second arm pivoted to the arm above mentioned and a followeron that arm engageable with the other of said cams for returning the layto its position of rest, and resilient means for moving the said secondmentioned arm to a position in which the follower carried thereby ispressed tightly against the cam with which it engages, and a bushingcooperatively associated with said resilient means and of slightly lessextent than that said means when in its operatively adjusted state, forlimiting relative movement between the first and second arms uponfailure of the resilient means to maintain the followers in contact withtheir cams.

WALTER J. BUDZYNA. MAURICE R. FLAMAND.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,487,833 Benoit Mar. 25, 19241,975,587 Lewin et al. Oct. 2, 1934 2,363,415 Harter Nov. 21, 19442,426,036 Lynam Aug. 19, 1947 FOREIGN PATENTS Number Country Date 57,026Norway Sept. 14, 1936 502,525 Germany July 15, 1930

